What you need to do is find the file in your theme that is generating it. It maybe somewhere in page.php or elsewhere. Best bet might be to search your files for this bit of text:

rd-page-navigation

When you find it, you'll have found the code block that needs to be removed. Be sure to back up any files before making any changes in case something goes wrong. I'm also tagging this with the name of your theme - raindrops - as the theme maker probably is the best person to help you with this.